Coexistence of anisotropic and motionally averaged EPR spectra in a Jahn-Teller system:: Cu2+ ion in [Fe(NH2trz)3(NO3)2 compound

被引：8

作者：

Cantin, C

Daubric, H

Kliava, J

Kahn, O

机构：

[1] Univ Bordeaux 1, Ctr Phys Mol Opt & Hertzienne, CNRS, UMR 5798, F-33405 Talence, France

[2] Inst Chim Mat Condensee Bordeaux, Lab Sci Mol, CNRS, UPR 9048, F-33608 Pessac, France

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 108卷 / 01期

关键词：

D O I：

10.1016/S0038-1098(98)00304-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electron spin resonance in copper-doped polymeric iron(II)-1,2,4-triazole compound [Fe(NH(2)trz](3)(NO3)(2) is studied at different temperatures below the low spin to high spin transition of Fe2+ ions. Between liquid helium and liquid nitrogen temperatures typical anisotropic spectra of Cu2+ in a static Jahn-Teller configuration are observed, while the room temperature spectra undergo dynamic averaging. At intermediate temperatures both the anisotropic and averaged spectra coexist. These results are accounted for assuming a Gaussian distribution of the energy difference Delta between the lowest and the higher valleys of the Jahn-Teller potential energy surfaces, with the mean Delta-value ca. 0.021 eV and the standard deviation ca. 0.0066 eV. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：17 / 22

页数：6

共 22 条

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